Is it possible for a man to be sterile and still produce semen? Explain
What will be an ideal response?
Yes; semen contains sperm and secretions from the seminal vesicles, prostate, and bulbourethral glands. If a man is sterile, he is not producing sperm, which is only one component of semen.
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The general purpose of the synaptonemal complex is to __________
A. provide a link between homologous chromosomes in meiosis. B. enable the reformation of the cell wall during cytokinesis. C. separate the sister chromatids during anaphase. D. independently assort the chromosomes during metaphase of meiosis. E. None of the answers are correct.
Where are male cones in gymnosperms?
a. in the highest branches of the tree b. evenly distributed randomly throughout the tree c. in the lower region of the tree d. immediately adjacent to each female cone
The ultimate source of all energy in a terrestrial ecosystem is
a. the organic matter in all the organisms of the ecosystem. b. water. c. sunlight. d. carbon dioxide. e. ATP.
Cells are _____
A) only found in pairs, because single cells cannot exist independently B) limited in size to 200 and 500 micrometers in diameter C) characteristic of eukaryotic but not prokaryotic organisms D) characteristic of prokaryotic and eukaryotic organisms